I tried to find some reading online regarding it but couldn't find any so I was hoping you guys can help me answer my question.

Right now my fry are just about to free swim ..so I will find out sooner or later but just curious... What happens to the bubble nest? Does the bubble just pop, evaporate, disappear...? Anything I need to do to prepare for this? Comments appreciated thanks.

Hi and welcome to the forum,
Bubbles nest will eventually pop. Males always need to make new bubbles. SO when he stops making them, they will eventually disappear. Don't worry about the nest. When fry are free swimming, they won't need the nest.